The present invention relates to a backrest, designed particularly for a BMW™ motorcycle, including a mounting bracket configured to conform to and fit between the rear edge of the driver's seat and the front edge of a passenger seat. The mounting bracket includes two ends each having a flange thereon that is secured to the motorcycle chassis with fasteners that typically fasten the passenger seat thereto. A height adjustable, hinged brace member connects a padded backrest to the mounting bracket.
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1. A backrest assembly for a motorcycle, said motorcycle having a chassis with a driver's seat attached thereto, said driver's seat having a rear edge, said motorcycle further including a passenger's seat having a front edge adjacent said driver's seat rear edge, said passenger seat attached to said chassis with a pair of fasteners, said backrest assembly comprising:
an arcuate mounting bracket having a select curvature that conforms to both the rear edge of the driver's seat and the front edge of the passenger seat, said mounting bracket attached to said chassis;
a length adjustable brace member attached to said mounting bracket;
a padded backrest member attached to said brace member.
10. A backrest assembly for a motorcycle, said motorcycle having a chassis with a driver's seat attached thereto, said driver's seat having a rear edge, said motorcycle further including a passenger's seat having a front edge adjacent said driver's seat rear edge, said passenger seat attached to said chassis with a pair of fasteners, said backrest assembly comprising:
a mounting bracket contoured and dimensioned to concealedly fit between the rear edge of said driver's seat and the front edge of said passenger seat, said mounting bracket attached to said chassis with said fasteners;
a length adjustable brace member attached to said mounting bracket, said brace member including a first outer section, said outer section including an elongated slot, a second inner section slidably received within said outer section, said inner section having an aperture thereon, an attachment means received within said slot and said aperture for adjustably connecting said inner and outer sections;
a padded backrest member hingedly attached to said brace member;
a locking, angular adjustment means for fixing said backrest member at a select angle relative to said brace member, said locking, angular adjustment means including a spring-biased mounting flange secured to a lower end of said brace member outer section, said mounting flange fastened to said mounting bracket, an adjustment screw adjustably engaging said spring-biased flange to lock said brace member at a select angle.
2. The backrest assembly according to
3. The backrest assembly according to
a first outer section, said outer section including an elongated slot;
a second inner section slidably received within said outer section, said inner section having an aperture thereon;
an attachment means received within said slot and said aperture for adjustably connecting said inner and outer sections.
4. The backrest assembly according to
5. The backrest assembly according to
6. The backrest assembly according to
7. The motorcycle backrest according to
8. The backrest assembly according to
an adjustment screw adjustably engaging said spring biased flange to lock said brace member at a select angle.
9. The motorcycle backrest according to
11. The backrest assembly according to
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This application is entitled to the benefit of provisional application No. 60/428,756 filed on Nov. 21, 2002.
The present invention relates to a backrest for a motorcycle designed particularly for certain BMW™ models.
Motorcycles typically include a bench style driver's seat with no backrest. Driving for extended periods of time on such seats can be uncomfortable, and possibly injurious, due to the lack of lower back support.
Various backrests for motorcycles have been heretofore designed to address this problem. For example, U.S. Pat. No. D371,529 issued to Potter discloses an ornamental design for a retrofit motorcycle backrest.
U.S. Pat. No. 6,224,081 issued to Wayman, et al. discloses an adjustable motorcycle backrest attached to a shaft that is positioned inside a torsion spring. The spring prevents the backrest from moving rearwardly.
U.S. Pat. No. 4,570,998 issued to Hughes discloses a motorcycle backrest and passenger seat that is pivotal between a vertical position for use as an operator backrest and a horizontal position for use as a passenger seat.
U.S. Pat. No. 4,313,639 issued to Ware discloses a motorcycle backrest that mounts to the motorcycle seat frame. A cylindrical backrest pad is secured to the outer ends of a pair of support arms, which are in turn pivotally mounted to a frame.
U.S. Pat. No. 3,822,917 issued to George discloses an adjustable backrest for motorcycles that is slidably adjusted between two parallel tracks mounted on the motorcycle frame.
As indicated above, numerous backrests for motorcycles exist in the prior art. However, none are specifically designed for BMW™ models as is the present invention. Accordingly, the present invention includes a uniquely designed, arcuate mounting bracket configured to conform to the rear edge of the driver's seat and the front edge of the passenger seat so as to concealedly fit therebetween. The mounting bracket is contemporaneously mounted to the chassis along with the seat using the existing seat fastener. Alternate embodiments for different model BMW™ motorcycles include varying the contour or configuration of the mounting bracket so as to neatly fit between the passenger and driver seats.
The present invention relates to a backrest assembly for a motorcycle designed particularly for various BMW™ models such as a K1200 LT, a 1200 CL and an R1100/1150 RT. A first embodiment comprises an arcuate mounting bracket having a select curvature corresponding to the curvature of the rear end of the driver's seat; the bracket terminates at two ends, each end with a flange extending therefrom. Each flange includes an aperture for receiving a screw to fasten the bracket to the motorcycle chassis. The bracket is secured between the front edge of the passenger seat and the rear edge of the driver's seat using screws that typically fasten the passenger seat to the chassis. A hinged, length adjustable brace assembly connects a padded backrest to the mounting bracket. Alternate embodiments include varying the configuration of the mounting bracket to fit between passenger and driver's seats on other models.
It is therefore an object of the present invention to provide a backrest that is specifically designed for a BMW™ motorcycle.
It is another object of the present invention to provide a backrest for a motorcycle that provides lower back support for a motorcycle driver.
It is yet another object of the present invention to provide a backrest for a motorcycle that can be quickly and conveniently installed.
Other objects, features and advantages of the present invention will become readily apparent from the following detailed description of the preferred embodiment when considered with the attached drawings and the appended claims.
The present invention relates to a backrest for a motorcycle that is particularly designed for various BMW™ models. Referring specifically now to
The backrest according to a first embodiment of the present invention includes an arcuate mounting bracket 4 having two ends, each end having a flange 6 extending therefrom. Each flange includes an aperture 8 for receiving one of the passenger seat screws 2 to simultaneously fasten the bracket and the passenger seat to the motorcycle chassis. The bracket has a select curvature that substantially conforms to both the rear edge of the driver's seat and the front edge of the passenger seat so as to fit neatly and concealedly therebetween.
Now referring specifically to
The top end of the inner section includes a hinged flange 25 that is secured to the rear surface of a padded backrest member 13. The hinged flange allows the backrest member to pivot. Similarly, a mounting flange 55 is pivotally mounted to the lower end of the outer section that fastens the brace assembly to a U-shaped clamp member on an upper portion of the mounting bracket. The flange 55 is spring-biased against an adjustment screw 53 that maintains the backrest in an upright position. The adjustment screw allows a user to adjust the angle of the brace member, and thus the angle of the backrest member, relative to the mounting bracket.
Now referring to
Now referring specifically to
Angularly extending from the top edge of the frame member is a backrest support structure 27 to which the padded backrest member is attached. Preferably, the angle α between the frame member and support structure is 125 degrees, though the angle can be varied to suit a particular application. Both the support structure and frame member include a slot 28 for accommodating a seat adjustment mechanism typically installed on a BMW™ R1100/1150 RT. As with the above embodiments, a U-shaped clamp member 29 is attached to a top edge of the support structure to which the adjustable brace member is fastened.
The above described device is not to be limited to the exact details of construction and enumeration of parts described above. Though the device is described as being designed for specific model motorcycles, the backrest assembly according to the present invention can include other variations so as to be easily attachable to other models and makes.
Although there has been shown and described the preferred embodiment of the present invention, it will be readily apparent to those skilled in the art that modifications may be made thereto which do not exceed the scope of the appended claims. Therefore, the scope of the invention is only to be limited by the following claims.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Nov 03 2003 | GRATZI, MIKLOS | Case Western Reserve University | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 014869 | /0481 | |
Nov 03 2003 | NAIR, SUMITHA | Case Western Reserve University | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 014869 | /0481 |
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